Lamp



FIG. 1 is a front view of the lamp in accordance with my new design; the back side view being identical to the front view;

FIG. 2 is a right side view of the lamp in accordance with my new design; the left side view being identical to the right side view;

FIG. 3 is a first perspective view thereof;

FIG. 4 is a second perspective view thereof.

FIG. 5 is a top view thereof; and,

FIG. 6 is a bottom view thereof.

The broken lines show environmental structure that forms no part of the claimed design. 

The ornamental design for a lamp, as shown and described. 